Nijiro Murakami was 16 in Still the Water when he played the character 'Kaito'.
That was over 10 years ago in 2014.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 27, and has starred in 29 movies in total, 28 of those since Still the Water was released.
In Still the Water, I think Nijiro Murakami looks: